Carbon dioxide frozen in the solid state, used especially as a cooling agent and for the production of fog-like special effects. It sublimes at −78.5 °C (−109.3 °F) at normal atmospheric pressure.

A surname.

Baeolophus ridgwayi, a small bird of the tit family Paridae

Of or relating to Georg Ossian Sars (1837–1927), Norwegian marine and freshwater biologist.